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Swift 3でDictionaryのキーだけの配列を作る

Last updated at 2017-01-03Posted at 2017-01-03

var dictionary = [
    "key1": "value1",
    "key2": "value2"
]

print(dictionary.keys)

↓

LazyMapCollection<Dictionary<String, String>, String>(_base: ["key2": "value2", "key1": "value1"], _transform: (Function)) とかいうの出てきた

`[String]`でイニシャライズすればいいっぽい

var keys = [String](dictionary.keys)
print(keys)

↓

["key2", "key1"]

（※Dictionaryでは順番は保証されません）

参考